New York City Police said they have arrested someone in connection with a fatal shooting near Penn Station.

Police spokeswoman Sgt. Jessica McRorie confirmed the detention of the suspect to USA TODAY on Thursday, but declined to provide a name or to say whether he is Vincent Arcona, who was identified by police on Tuesday as a "person of interest."

Police launched a massive manhunt Monday after a gunman killed one man and wounded two others outside a subway station during the morning rush hour.

Street closures in the area of 35 St. & 8th Ave in Manhattan due to police investigation. Use alternate routes.

The victims, all in their 40s, had been drinking coffee in a McDonald's when the heavy-set gunman in a black-hooded sweatshirt began arguing with them, Robert Boyce, the city's chief of detectives, said on Monday.

"Those individuals then walked out of the McDonald's and into the subway station," Boyce said. "They were followed by the same individual."

Moments later, four gunshots rang out just two blocks from the crowds at Penn Station, Boyce said.

Boyce said one of the wounded men was shot twice in the torso. The other wounded man, shot in the leg, "is giving us a narrative of events as we go forward" with the investigation, Boyce said. Two of the victims attend the program, the Associated Press reported, citing friends of the victims. Boyce declined to discuss any connection to a methadone program run out of the nearby West Midtown Medical Group.

Witness Joe Sarcone, 36, of Manhattan, told The Wall Street Journal that he saw "about six guys arguing. Then I saw one guy take out a pistol. I said, 'Oh my God.'"